# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

# 添加我们自己要编译的so库，以及源码文件
add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp )

# 增加opencv库
add_library( opencv_java3 SHARED IMPORTED )
# 编译的平台是armeabi
if(${ANDROID_ABI} STREQUAL "armeabi")
    # 设置动态库文件的路径属性
    set_target_properties(
        opencv_java3
        PROPERTIES IMPORTED_LOCATION
        ${CMAKE_SOURCE_DIR}/src/main/jniLibs/armeabi/libopencv_java3.so
        )
endif(${ANDROID_ABI} STREQUAL "armeabi")

# opencv库的头文件路径设置，在此是opencv-sdk的路径，当然你也可以把include目录拷贝到工程中
include_directories(
    ${CMAKE_SOURCE_DIR}/src/main/include
)

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# 需要链接的库
target_link_libraries( # Specifies the target library.
                     native-lib
                     opencv_java3
                     # Links the target library to the log library
                     # included in the NDK.
                     ${log-lib} )

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )